package com.study.netty;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpServerCodec;

/**
 * 初始化器
 * channel注册后,会执行里面的相应初始化方法
 */
public class HelloServerInitializer extends ChannelInitializer<SocketChannel> {
    protected void initChannel(SocketChannel socketChannel) throws Exception {
        //通过SocketChannel获取对应的管道
        ChannelPipeline pipeline = socketChannel.pipeline();

        //通过管道添加Handler
        //HttpServerCodec是由netty自己提供的助手类,可以理解为拦截器
        //当请求到服务器,我们需要做解码,响应到客户端做编码
        pipeline.addLast("HttpServerCodec", new HttpServerCodec());
        //添加自定义助手类,返回Hello netty`
        pipeline.addLast("CustomHandler", new CustomHandler());
    }
}
